LAUSR

Abstract Lead halide perovskite have primarily considered as photovoltaic materials for luminescent materials and optoelectronic devices. However, lead halide perovskite is assumed to be unsuitable for photoelectrochemical conversion due to the instability in humid environment or polar solvents. Here, we report graphene oxide (GO) wrapped organic-inorganic lead halide perovskite quantum dots (GO/CH3NH3PbBr3 hybrid) for photoelectrochemical conversion CO2 into solar fuels in nonaqueous media. Graphene oxide can protect CH3NH3PbBr3 QDs from erosion by organic solvent, and also serve as electron transport medium to separate photoinduced electrons and holes. Therefore, a photocurrent increase by ca. 200% can be obtained in the GO/CH3NH3PbBr3 hybrid due to improved electron extraction and transport. The GO/CH3NH3PbBr3 electrode exhibits an effective CO2 reduction capacity to CO, yielding 1.05 μmol cm−2 h−1.